^42 ORCHIDES. 



ONCIDIUM. 



«3. ONCIDIUM SCANSOR Rchb. fll. in Linn. XXII. 844! L. F. p. 26: 



convolvulaceum Lindl. in Paxt. Fl. Garden, Vol. I. under t. 'H. 

 This has tlie twirnng stem of a Convolvulus. Flowers solilary, two inclies in dia- 

 mcter, willi a large yellow lip. 



Wild in iNew-Grcnada— Warscewicz ; near Ocanno, al the heighl of 5400 ft.— Schl., 

 1013; Venezuela— Funck and Schlim, 1444. 



Cf. Walp. .\nn. III. 555. — Oncidium convolvulaceum Lindl. Paxt. Fl. G. I. 102: 

 Rliizomate volubili filiformi, pseudobiilbis secus rhizoma distanlibiis 

 comprej^sis siibrotundis monophyllis, folio plano sessili ovato oblongo 

 obtuso mucronulato, pedimctilis basi squamatis unifloris folio subaequa- 

 ]ibus, sepalis liberis petali.«que latioribus oblongis aculis patenlissimis, 

 labello maximo bilobo baseos auricuiis linearibus apice dilatatis, roLun- 

 datis , crista elevata truncata utrinque lobala verrucis duabus a fronte, 

 columnae alis acutis truncatis. 



Venezucla 1444. Funck and Schlim. Hahit of Bolbophyllum agreeing in thal wiih 

 0, serpens. On a hard twining rhizoma appear at the distance of 3 — 4 inches one- 

 leaved pseudobulhs usually sjiringing from the axil of a small leaf. These pseudo- 

 bulbs are thin, nearly round, scarcely an inch long, and each bear a solitary (lat leaf 

 aboul 2 inches long. Flowers nearly 2 iiiches in diameter , grow singly on peduncles 

 scarcely longer than the leaves. 

 84. ONCIDIUM S.XRCODES Lindl. in Journ. Ilort. Soc, XIV. 2(50. L. F. p. 26. 

 0. Rigbyanum Paxt. Mag., Oct. 1849. 

 The habit is that of 0. pubes and aniiclum. Flowers laige, bright yellow blotched 

 with brown-red. Column whitc wiih blood-rcd. fleshy, truncatcd wings. 

 Wild in Brazil, according to Gaiden aulhority. 

 Cf. Walp. .Ann. III. 556. — Oncidium liigbyanum Ilort. Paxt. 1. c. : 

 Pseudobuibs something cylindrical, 3 inches long. Leaves 2—3 on 

 Ihe summit of each pseudobulb, erecf, lanceolate. Fiowers paniculate. 

 Scape one foot long. Sepals and pelals bright lemon yellow, var. in 

 Ihe centre of each , with numerous dark brown spots. Labellum large 

 spreading, Ivvolobed , somewhat curved at the edges , bright yellow, 

 spotted wilh daik green. 



€5. ONCIDIUM EXr.AV.-VTUM Lindl. in Sert. Orch. sub t. 25. B R. 1839. Misc. 150. 

 Paxt. Fl. Gard. I. t. 21. L. F. p. 27 : 



(B.) aurosutn. Flowers deep brown in ihe niiddlc. Crcsl very rugosc , wilh a 

 Ihin vertical plate interposed beiween the front lateral ridges. 

 0. aurosum Rchb. lil. in Bonpl. Mai 1. 1854. 



Flowers biight yellow with brown siains ncar tlie base of the lobes. Tho crcst 

 is very convex, excavated in fronl , .sludded wilh sniall wliile luberclcs, has a decur- 

 rcnt iamella froni eiilier side of tlie base , a small looihed ridge . and a pair ol out- 

 lying teeth on each side. 0. aurusum Uchb. can hardly be disiiiiguishcd froni 0. ex- 

 cavatum. The cresl is ccriainly raiher dilfcrent , and llic llowcrs perliaps larger and 

 more compactly arranged. 



Wild in Pcru; Cliachapoyas — Matliews in hb. Ilooker; sources of the Marannon- 

 Warscewicz. 



0. cxcavutum Lindl. Sert. 25: 



rseudobulbis folii.^quc ligulatis, scapo paiiiculato, bracteis squami- 

 formibus rnembranaceis aculis, sepalis lateralibus obovatis oblusis liberis 

 supremo concavo acuto, pelalis membranaceis oblongis retu.sis basi an- 

 gustalis , labello sessili pandurato apice lolundato einarginato sellae- 

 formi basi cordato convexo fornicatim excavalo ,' columnac alis relusis 

 lotundatis. 



Peruv. prov. Chachapoyas Matihews. 



